johnson



(Ho Model.) 2 Sheets-Sheet 1.

P. G. JOHNSON.'

M PETERS. Phmo-mhogmphar. wnmingm. D. u" .L

(NovModel.) 2 Sheets-Sheet 2.

P. G. JOHNSON.

ELBVATOR.

No. 367,046. Patented July 26, 1887.

UNITED STATES PATENT OrrroE.

FRANK G. JOHNSQN, OF NEV YORK, N. Y.

ELEVATO R.

SPECIFICATION forming part of Letters Patent No. 367,046, dated July 26, 1887.

Application filed September l, 1886. Serial No. 212.664.

To all whom, it may concern:

Be it known that I, FRANK G. JOHNSON, citizen of the United States, residing in the city, county, and State of New York, have invented new and useful Improvements in Bassenger and other Elevators, of which the fol lowing is a specification.

My invention relates to improvements in elevators for conveying passengers up and down in buildings; and the object of the improvements is to render it impossible for the operator of such elevators to start the elevator until he closes and fastens the door of ingress and egress to the same, whereby is prevented all liability and possibility of the passengers being caught and crushed or injured in the doorway by the movement of the car of the elevator,thus wholly preventing this class of accidents and increasing the safety of elevator conveyance. I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure l is a sectional view on the plane of the line a" x, Fig. 2; Fig. 2, a horizontal sec` tion on the plane of the line y y, Fig. l; Fig. 3, an enlarged view of door mechanism; Fig. 4, a sectional view of same on the line z e,Fig. 3; Fig. 5, a modification of door mechanism; Fig. 6,21. sectional view on the line z z',Fig. 5; Fig. 7, an enlarged view of the clutch mechanism; Fig. 8, a sectional view of the clutch on the line 'w w, Fig. 7.

Similar letters refer to similar parts thron ghout the several views.

Before describing in det-ail the several views and parts which they represent, a brief and general description of the means employed for effecting the object of my invention may be stated,as follows: Ihe operating rope or cable O C, Fig. 1, by which the movements of the car of the elevator are controlled,is connected with the several doors of ingress and egress by means of the clutch E at or near the top of the well-hole, Figs. l, 2, and 7, and the bellcrank levers F and H II H,Figs. l and 3,and the wires f", Fig. 2, and Gv G, Fig. l, and springs e, Fig. 2, and J J J, Fig. l, and the projections I I I, Figs. l, 3, and 4, in such a manner that when all the doors B B B are closed the operating-rope G C is free to be moved, and the elevatorecar thereby to be started either upward or downward 5 but that (No model.)

whenever either of the several doors is opened, or is standing open, the clutch E, by the action of the superior springs J J J, Figs. l and u 3 grasps the operating-.rope C C, and thereby prevents the operator from moving it (the rope) to start the car either upward or downward until he first releases the operating-rope from the clutch, which he can do only by closing the open door, which will be opposite to or in front of the floor of the building where the passengers are to be landed or taken.

A more minute description of the mechanism of my invention is as follows:

A A A represent the framework around the wellhole of the elevator; B B B, doors of ingress and egress to the elevator as provided in each story of the building. rlhese doors are shown asscen from thcinterior of the elevatorcar, and are opened by sliding them to the right.

C Gis the operating-rope, which passes over the loose rendering-pulley D.

E is aclutch which, when it is not clamped, loosely surrounds the operating-rope, and through which it (the rope) passes up and down as the operator stops and starts the car. This clutch E is located near the rendering-pulley D, above the highest possible position of the car. One part, C, of the clutch is fastened by bolts C C, Figs. 2 and 7, to a rigid arm of the frame-work A A A. The other or moving part of t-he clutch is a lever, (with two long arms,) secured at its fulcrum to the rigid part C. The arm e' is worked by the spring e", which keeps the clutch open when all the doorsB BB are closed. The arxn e", when actuated by the wire f, Figs. 2 and 7, closes the clutch and grips the operatingrope C so securely that the operator cannot move it (the rope) upward or downward-that is, whenever there is a door open-as will be more clearly showin hereinafter.

The wire f", Figs. 2 and 7, connects the longer arm, e, of the clutch E to the vertical armf of the be1lcrank lever F; and f is a nut for tightening or adjusting the length, of the wire f. The horizontal arm ff of the bell-crank lever F is extended transversely, in. order to afford room for attaching the several connectingwiresG GG, Figs. l, 2, and7. g'gg, Fig. 7, represent nuts for tightening or adjusting the wires G G G. The wires G G G, Figs. l

IOO

and 8, extend from the bellerank lever F to the horizontal arms of the bell-crank levers H II H, Figs. 1 and 3. `These connecting-wires G G G extend from these horizontal arms of the bell crank levers H H H to and connect with the operating-springs J J J, Figs. l and 3, either one of which springs will tighten and grip the clutch E upon the operating-rope C C whenever it (the spring) is allowed to contract by releasing either one of the bell-crank levers HH H by sliding back either of the doors B B B.

Figs. 3 and 4t illustrate the device to be fastened on the doors B B B.

I is a projecting post or pin fastened to the upper left-hand corner of the sliding door, which, when the door is being closed, strikes against andrarries the vertical arm h', Fig.'

3, of the bell-crank lever H to' the left, andthe horizontal arm h of the bellici-ank lever L H in its highest position and releasesthe yconnecting-wire G from the action of the operating-spring J, which allows the releasingspring c, Figs. 2 and 7, to open the clutch E, and thus liberate the operating-rope C C, which now enables the operator of the elevator to start the car.

IL in Figs. and 6 illustrates a configura' tion of the projecting pin or post I in Fig. 3, that operates thebell-crank lever H, to enable it (the post) to be placed on the door B, if it should be desirable so to do, near to the knob ofthe door, Vinstead of on top of the door.

From the above description of the construetion and functions of the several parts of my invention a further explanation of their con1- bined operation is briefly described as follows:

Referring to Fig.,3, it will be seen that if the door Bv` be carried to the right the operating-spring J will draw the eonnecting-wire G down and cause the bell-crank lever H to assume the position shown by the dotted lines of its form and tighten the clutch E upon the operating-rope C C, as shown by the dotted lines in Fig. .7. While the `door B is thus `standing open, and until it is ,closed completely, the operator cannot start the car of the elevator, for it is only by closing the doorV that the operating-spring J can be extended and the connecting-wire G released from the spring. As soon as the door B is closed, the

tor of the elevator to start the car either upward or downward.

The operation of all the doors B B B of ingress and egress is the same as illustrated by Fig. 1. When all the doors are closed, the strain of the springs J J J on all the connecting-,wires G G G is taken off, which allows the releasing-spring 0', Figs. 2 and 7, to open the clutch E; but the opening of either door tightens the connecting-wire G, that connects with the door that may be opened, which will cause the clutch to grip the operating-rope, and the effect upon all the other connectingwires G G G will be to slacken them until the open door is again closed.

As it is evident that clutches for grasping the operating-rope G C can be variously contrived, I do not limit myself to the exact construction of the one shown and described. As a weight and cord may be substituted for the releasing-spring c, I do not limit ,myself yto the use of ya spring for opening the clutch E; also, as Weights might be substituted for the operating-springs J J J, I do not, therefore, limit lnyself to the employment of springs for these purposes.

Having thus described my invention,what I claim as new and useful, and desire -to secure by Letters Patent, is-

l. In passenger-elevators, Vthe combinationy substantially asV and for the purposes de-` scribed.

3.` In passenger-elevators, the combination of the bellcrank lever F, connecting-wire G, bell-,crank lever H, operatingfspring J, clutch E, releasing-spring e, operating-rope C C, `and lOO door B, substantially in the manner and4 for the purposes set forth.

4. In passenger-elevators, the combination- 

